Stirrup for reinforced concrete.



A. ATKINSON.

STIRRUP FOR REINFORCED CONCRETE.

APPLICATION FILED DEC. 24, 1910.

1,110,416. Patented Sept. 15, 1914 7 wi h was:

THE NORRIS PETERS 60., PHGTOLITHO WASHINGTON. D. c.

UNITED STATES PATENT OFFICE.

ASHER ATKINSON, OF NEW BRUNSWICK, NEW JERSEY, AS SIGNOR, BY MESNEASSIGN- MENTS, TO HENRY B. NEWHALL, OF LITTLETON, NEW HAMPSHIRE.

STIRRU]? FOR REINFORCED CONCRETE.

Specification of Letters Patent. Patented Sept. 15, 1914.

Application filed December 24, 1910. Serial No. 599,118.

To all whom it may concern Be it known that I, ASHER ATKINSON, a citizenof the United States, residing at New Brunswick, in the county ofMiddlesex and State of New Jersey, have invented certain new and usefulImprovements in Stirrups for Reinforced Concrete, of which the followingis a full, clear, and exact description.

This invention relates to a stirrup for reinforced concrete constructionand especially adapted to be used in connection with beams although itis capable of more or less general application.

To these ends the invention consists in certain novel and peculiarfeatures of construction of parts, as hereinafter described and claimed,and in order that it may be fully understood reference is to be had tothe accompanying drawing in which:

Figure 1 is a side view of my novel stirrup and the preferred form ofbar to which it is to be connected; Fig. 2 is a plan view taken on theline IIII of Fig. 1; Fig. 3 is a view in side elevation, on a reducedscale, showing several stirrups connected to a bar, and Fig. 4 is across section of the bar just in front of the stirrup, showing the sameembedded in the concrete.

Referring to the drawings in detail, 1 indicates a reinforcing bar ofany suitable contour. This bar is preferably of rectangular form andupon the sldes thereof are elongated lugs 2 extending transverselythereof, alternating with each other on the different sides. To the baris attached my novel stirrup. The same comprises the upright portion orloop 3 which is embedded in the concrete. The arm 4: of the loop extendsdownwardly to the lower side of the bar and engages with the arm 5 atthe point 6, the arm 5 being bent half way around the bar as shown. Thearm 4 is bent at 6 and extends upwardly and forwardly, this upwardly andforwardly extending portion being designated 7. The portion 7 is bentsubstantially at right angles at 8 and extends across the top andconstitutes the portion 9. This portion 9 is in turn bent at rightangles at 10 and constitutes the portion 11 and the latter is bent toform the loop 12 the projecting portion thereof being designated by 13,the latter being located approximately midway between the lower cornersof the bar as shown. It will be noted that the stirrup formed in thispeculiar Way has a side opening between the portions 9 and 12 equal tothe thickness of the bar to be used and allows the bar to be insertedinto the loop formed by the portions 9, 11 and 12. The projectingportion 13 is so formed as to contact with the lower surface of the barand holds the same in the position shown. As before stated the arm 5 isbent at 6. This bend is so made that when the bend 6 of the arm 4 isplaced over the portion 14: the former will ride down the latter, owingto the resiliency of the loop 3 and cause the said arms 4: and 5 to hugthe bar 1.

In assembling the loop constituted by the parts 9, 11 and 12 is placedupon the bar at the desired place. The arms 4. and 5 of the loop 3 arespread apart and the bar inserted therebetween. The part 14 is thenforced over the bend 6. The transverse projections 2 engage with thestirrup which prevents the latter from sliding longitudinally of thebar.

If for any reason the loop 3 does not. hug the bar 1 the stirrup will,nevertheless, be held in proper position by means of the projecting end13 pressing on the undersurface of the bar 1 which will tend to rock theentire stirrup upon the portion 9 and thereby cause the arms 4 and 5 ofthe loop to move vertically and the portion 6 be brought into contactwith the lower portion of the bar 1, Figs. 1 and 3. The resiliency ofthe members 7, 9, 11, 12 and 13 will insure that the stirrup will remainin the position in which it is placed on the bar 1.

What I claim is:

1. In a stirrup for concrete construction, a bar, a resilient loopprojecting upwardly from the bar, one arm of said loop bentsubstantially half around said bar and then rearwardly, the other arm ofsaid loop bent to an acute angle, the rearwardly projecting portion ofthe first named arm adapted to engage the acute angle of the secondnamed arm.

2. In a device of the class described comprising in combination, a bar,a stirrup comprising a loop extending upwardly from a point below saidbar and having two arms, one of said arms provided with means thereonfor effecting a camming engagement with the other below said bar wherebythe said arms are caused to engage with the sides of said bar, anextension on one of said arms along one side of the bar, a loop on saidextension at a distance from the first mentioned loop adapted to engagea projection on said bar to prevent the same from slipping lengthwisethereof, and means on said second mentioned loop to aid in maintainingthe first mentioned loop snug against the under side of said bar.

3. In a stirrup for reinforcing concrete, comprising an upwardlyextending resilient loop adapted to engage a bar, one of the arms ofsaid loop bent at an angle and ex-' tending forwardly and having meansthereon to engage the bar, the other of said arms bent at an angle andadapted to engage the first mentioned arm at the angle thereof.

4. A stirrup comprising a loop mounted upon and projecting upwardly froma bar, said loop formed by a plurality of resilient arms, an extensionon one of said arms and a second loop substantially of U-shapedformation on said extension adapted to engage said bar, said armsadapted to be separated in placing said loop Over said bar and one ofsaid armshaving means thereon for efiecting a camminggengagement withthe other after being placed thereon to support the loop. I

5. In a stirrup for reinforcing concrete, comprising an upwardlyextending resilient loop adapted to engage a bar, one of the arms ofsaid loop bent at an angle and eX- tending forwardly'and having meansthereon to engage the bar,-the other of said arms bent at an angle andadapted to engage the first mentioned arm.

6. A stirrup for reinforced construction, comprising an upwardlyextending resilient loop formed by two arms adapted tocross eachotherand form a lock beneath a rein forcing bar, one of the arms of the loopbeing extended and provided with a gripping member to cooperate with areinforcing bar to firmly hold the closed end of the stlrrup in contactwith the underside of the reinforcing bar and the entire stirrup in itsproper Copies of this patent may be obtained for five cents each, byaddressing the Commissioner of Patents. Washington, I). G.

